I agree with bkay and Cari, domestic sewing machines are not made to sew several layers of heavy leather. You may find one that does it better than some others, but it probably won't do it very well or for very long. A domestic machine isn't made for that. If that is what you want, you'll probably just have to buy a machine made for that. I don't really understand why you would not want to buy a commercial machine to do commercial type sewing.